interface HTMLElementWithExpander extends HTMLDetailsElement {
    ODS_Expander?: Expander;
}
export default class Expander {
    private element;
    constructor(element: HTMLElement);
    toggle(): void;
    private syncGroup;
    init(): void;
    update(): void;
    destroy(): void;
    static getInstance(el: HTMLElementWithExpander | null): Expander | null;
}
export {};
